【MySQL】【leetcode】 Employees Earning More Than Their Managers解题报告

题目

The Employee table holds all employees including their managers. Every employee has an Id, and there is also a column for the manager Id.

Id	Name	Salary	ManagerId
1	Joe	70000	3
2	Henry	80000	4
3	Sam	60000	NULL
4	Max	90000	NULL

Given the Employee table, write a SQL query that finds out employees who earn more than their managers. For the above table, Joe is the only employee who earns more than his manager.

+———-+
| Employee |
+———-+
| Joe |
+———-+

代码

到底谁比它主管的工资还高？

# Write your MySQL query statement below
select e1.Name as Employee from Employee as e1, Employee as e2 where e1.ManagerId = e2.Id and e1.Salary > e2.Salary;